Results 41 to 50 of about 34,931 (162)
Gravitational Effects on the Neutrino Oscillation [PDF]
, 1996 The propagation of neutrinos in a gravitational field is studied. A method of calculating a covariant quantum-mechanical phase in a curved space-time is presented.
Bilenky +9 more
core +5 more sources
An Exact Universal Gravitational Lensing Equation
, 1998 We first define what we mean by gravitational lensing equations in a general space-time. A set of exact relations are then derived that can be used as the gravitational lens equations in all physical situations.
A. Einstein +10 more
core +2 more sources
Shadows and photon spheres in static and rotating traversable wormholes
Nuclear Physics BWe explore the shadows and photon orbits of both static and rotating traversable wormholes by employing a redshift function in combination with two distinct shape functions.
Takol Tangphati +3 more
doaj +1 more source
Gravitational lensing in a plasma from worldlines [PDF]
Physical Review DWe study the deflection of light rays in a cold, nonmagnetized plasma using the worldline framework. Starting from Synge’s Hamiltonian formalism, we construct a position-space action and use it perturbatively to calculate light bending angles.
F. Comberiati, Leonardo de la Cruz
semanticscholar +1 more source
Precision Weak Gravitational Lensing Using Velocity Fields: Fisher Matrix Analysis [PDF]
Astrophysical Journal, 2019 Weak gravitational lensing measurements based on photometry are limited by shape noise: the variance in the unknown unlensed orientations of the source galaxies.
D. Wittman, M. Self
semanticscholar +1 more source
Roulettes: a weak lensing formalism for strong lensing: I. Overview [PDF]
, 2016 We present a new perspective on gravitational lensing. We describe a new extension of the weak lensing formalism capable of describing strongly lensed images.
C. Clarkson
semanticscholar +1 more source
Gravitational lensing in modified Newtonian dynamics
, 2001 Modified Newtonian dynamics (MOND) is an alternative theory of gravity that aims to explain large-scale dynamics without recourse to any form of dark matter.
Mortlock, Daniel J., Turner, Edwin L.
core +2 more sources
On the Electromagnetic Energy Flow Along Geodesics
Radio Science, Volume 61, Issue 1, January 2026.Abstract We present a field‐theoretic framework for modeling electromagnetic energy propagation in heterogeneous media by introducing the concept of electromagnetic geodesics. Unlike traditional ray optics, which assumes either a straight‐line propagation or a simple bending in refractive media, our approach formulates wave propagation as geodetic ...
Jacob T. Fokkema, Peter M. van den Berg
wiley +1 more source
Describing variations of the Fisher-matrix across parameter space
, 2016 Forecasts in cosmology, both with Monte-Carlo Markov-chain methods and with the Fisher matrix formalism, depend on the choice of the fiducial model because both the signal strength of any observable as well as the model nonlinearities linking observables
Reischke, Robert, Schäfer, Björn Malte
core +1 more source
Influence of the local Universe on weak gravitational lensing surveys [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Observations of the large-scale structure (LSS) implicitly assume an ideal Friedmann-Lemaitre-Robertson-Walker (FLRW) observer with the ambient structure having no influence on the observer.
R. Reischke +4 more
semanticscholar +1 more source